第一天cgi前后端链接

cgi/C_mysql_r_json.c

@@ -0,0 +1,47 @@
+#include <mysql/mysql.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main() {
+    MYSQL *conn;
+    MYSQL_RES *res;
+    MYSQL_ROW row;
+
+    conn = mysql_init(NULL);
+    if (conn == NULL) {
+        fprintf(stderr, "mysql_init() failed\n");
+        exit(1);
+    }
+
+    if (mysql_real_connect(conn, "localhost", "root", "root", "router", 3306,
+                           NULL, 0) == NULL) {
+        fprintf(stderr, "mysql_real_connect() failed\n");
+        mysql_close(conn);
+        exit(1);
+    }
+
+    if (mysql_query(conn,
+                    "SELECT JSON_OBJECT('username', username, 'password', "
+                    "password) FROM users")) {
+        fprintf(stderr, "SELECT query failed. Error: %s\n", mysql_error(conn));
+        mysql_close(conn);
+        exit(1);
+    }
+
+    res = mysql_store_result(conn);
+    if (res == NULL) {
+        fprintf(stderr, "mysql_store_result() failed\n");
+        mysql_close(conn);
+        exit(1);
+    }
+
+    while ((row = mysql_fetch_row(res))) {
+        printf("%s\n", row[0]);
+    }
+
+    mysql_free_result(res);
+    mysql_close(conn);
+
+    return 0;
+}